T-Shirt Sizing

Intuitive relative sizing that keeps the focus on complexity, not numbers.

What is T-Shirt Sizing?

T-Shirt Sizing replaces numerical story points with familiar clothing labels — XS, S, M, L, XL, XXL — to represent the relative size of a task. Instead of debating whether something is a 5 or an 8, the team simply asks: is this small, medium, or large?

This technique is especially useful in early-stage planning, roadmap discussions, or any context where the goal is a rough sense of scale rather than a precise estimate.

T-Shirt Sizing cards

Why Use T-Shirt Sizing?

  • Approachable for everyone

    Non-technical stakeholders and new team members can participate immediately. There is no learning curve — everyone understands what small, medium, and large mean.

  • Keeps discussions on complexity

    Without numbers in the room, conversations stay focused on relative effort rather than drifting into debates about exact hour counts or deadlines.

  • Reduces estimation pressure

    Labels feel less committal than numbers, which encourages honest estimates rather than conservative ones driven by accountability concerns.

  • Great for high-level backlog grooming

    When you need to size a full quarter's worth of work quickly, T-shirt sizing lets you move fast without sacrificing useful signal.

How to Use T-Shirt Sizing

  1. 1.

    Bring the team together

    Include developers, product owner, and any stakeholders who have context on the work. T-shirt sizing benefits from diverse perspectives.

  2. 2.

    Present each item

    Read each story or task aloud. Make sure everyone understands what is being asked before sizing begins.

  3. 3.

    Discuss complexity

    Before voting, briefly surface any technical risks, dependencies, or unknowns that might affect the size.

  4. 4.

    Vote and compare

    Each person picks a size privately, then all votes are revealed. Discuss any differences and agree on a final size.

  5. 5.

    Record and move on

    Log the final size and continue through the backlog. You can always convert sizes to points later once you have more context.

T-Shirt Sizing in PlanPoker

PlanPoker includes a T-shirt sizing deck ready to use. No setup — just open a room, switch the deck, and start.

  • T-shirt sizing deck included alongside Fibonacci, Scrum, and custom decks
  • Simultaneous reveal so no one is anchored by others' choices
  • Vote distribution charts to see where the team aligned
  • No sign-up required — share a link and your team joins instantly